harris



(No Model.) QSheets-Sheet 1.

D. W. HARRIS.

vMETAL DIE FOR MAKING AUGBRS.

.033. Patented Apr. 17,1883.

latest.

Lilhugnphor. wm'

(N0 Model.) 2 Sheets-Sheet 2.

D. W. HARRIS.

METAL DIE FOR MAKING AUGERS.

No. 27 ,033. Patented Apr.1 7,188 3.

g I v NITED STATES ATENT OFFICE.

DARIUS W. HARRIS, OF FISKDALE, MASSACHUSETTS, ASSIGNOR TO THE SNELLMANUFACTURING COMPANY, OF SAME PLACE.

ME TAL DIE FOR MAKING AUGERS.

SPECIFICATION forming part of Letters Patent No. 276,033, dated April17,1883.

- Application flied September 30, 1882. (No model.)

To all whom it may concern Beit known that I, DARIUS W. HARRIS, acitizen of the United States, residing at Fiskdale, in the county ofWorcester and State of Massachusetts, have invented certain new anduseful Improvements on Metal Dies for Dropping or Heading Angers,Auger-Bits, and other Boring-Tools, of which the followingis aspecification.

My invention relates to an improvementon the die described in UnitedStates Letters Patent No. 151,325, granted to Wm. Tucker, May 26,1874,said die being adapted to be clamped or otherwise fastened to the bed ofa drop-press, and to receive a bit or other borin g-tool to he headed ordropped, said heading or dropping being then effected by the descent ofthe drop or hammer, carrying a suitable die for forming the screw-pointand spurs. The lower die is provided with suitable projections to enableit to produce the side cuts on and give the requisite inside impressionto the end or head of the auger; and my improvement particularly relatesto the strengthening of these projecting parts of the lower die byforming a ridge extending from and forming an abutment for eachprojection on the two-part lower die, in the manner hereinafter morefully set forth.

In the accompanying drawings, Figure 1 is a front elevation of onemember of the twopart lower die embodying my invention. Fig. 2 is a planof the same, showing a bit or anger in place therein. Fig. 3 is avertical section thereof on the line 3 3, Fig. 1, looking to the left.Fig. 4 is a section on the same line,looking to the right.

The blocks of metal F, forming the stocks of the lower dies, and havingsuitable crimps, forming a spiral bore, 2, to receive the auger or bit,are clamped or secured in any manner to the bed of a drop-press, so asto be capable of clamping between them the twisted auger X, to beoperated upon. Undercut grooves f [are formed in the stocks F, withinwhich grooves slide guides g on the under surface of the hard-metal diesG. These dies, when in position, are firmly secured to the stock F byscrews H. The adjoining faces of the dies G have vertical concavitiesprovided with the ordinary crimps, forming a continuation of the bore 2for clamping the auger. The top of the dies G is provided with segmentalprojections or anvils y, terminating the twists, the same beingconcentric with the bore 2, and of the height of the required side cutsof the auger.

The dies, as provided with these projections, are adapted to give therequired inside impression to the end or head of the anger, theimpression on the outer side or extreme end of the auger being made byan upper die carried by the drop or hammer of the press, in mannersubstantially as described in the patent before referred to.

To render the projections or anvilsy stronger and enable them to resistthe crushing effect of the drop is the object of my invention, and thisobject 1 accomplish effectually by making the dies G'with ridges orabutments R, extending from the projections 31 across or partiallyacross the face of the die. These ridges are made of sufficient heightto serve as strong abutments for the anvils y, but are not made highenough to interfere with the descent of the drop or formation'of theside cuts of the auger.

Having thus described my invention, the following is what Iclaim as newtherein:

The dies G G, adapted to hold and form the heads of angers, auger-bits,or other boringtools, and having projections y and abutments R forstrengthening the same, substantially as described.

DARITTS W. HARRIS.

